Inverted incandescent gas-lamp.



INU, 897,616: PATENTED SEPT. l, lf.

M. GRAETZ.

INVERTER) INGANDESCENT GAS LAMP,

APELIGATION FILED 313.28, 1906.

" ATN Specification .Toall @Romiti/nay encara.'

*Be it' lrnownthatfl, MAX 'Genera a subject vof the King 'f Prussia,German Emeror,l and resident of 92-93 Elsenstrasse, erlin`, `vKingdom {OPrussia, German @Empire; have'inventefd certain new and usefulInprovements inlnverted Incandescent Gas-Lamps; of which the followingis an exact specification'.V

This inventionrelates to inverted incandescent gas lampsy and the objectof the present invention is to provide an improved vincandescent gaslamp' which shall work more eflicientlyfthanprior'forms and at the sametime be simple 1n construction.

The invention.isillustrated in the accompanying drawingsinfwhich Figurey1 vis a cross section through an imi- [proved lamp in accordance withthis invention. Fig. 2 is a section on lthe line A-B Fig. 1. Fig. 3 isan enlarged detail ofthe gas nozzle regulator shown in cross section.Fig. 4 is a separate' side view and Fig. 5' is a sectional plan of theregulating organ.

`[according to' thefforrn shown gas enters by apipe nipple e into theregulating device the direction of vthe'flow of the gas being shown bythe arrowsin Figs. i and 3. To this regulating device there is iin-ed atube m "which in turn is 'fixed to a tube b forming the burner tube andcarrying at its lower end an enlarged piece-lc towhich a orcelain burnertpn is iixed, a gauze or the like t' being preferably arranged in' .theconnection between the boxor tube 7c and the porcelain burner tip forthe purpose''of giving a final thorough lmixing tothe gas and air whichhave passed in company down the burner tube b. .On lthe shoulder formedby the box lc there rest the flanges of l-the chimneys c which as canbeseen from Fig.' :2 vare shown as two in number andjof segmental'` crosssection. 1

The two segmental `cliimneys are arranged opposite "one another 'withthe burner 4tube bf betweenso thattheir outer surfaces form arts iof`the samecylindiical surface. The Aowe'r endof the chimney is providedwith a v, turn up maas seen at'tlie right hand of Fig. l

inwhich the frame plate t rests. The frame plate isfin the form of'aninverted channel shown with"itsv outside flange il extendeddownw'ardiand' conveniently cut to an ernah of Letters Patent.

' pressed 'upwards by means of'a sprintgC rement@ sepa i, reos.

^ Application led February 28, 1906. Serial No. 393,513.

mental shape as shown. ln this outside flange `there engage the screws wwhich support the globe -w in the well known manner. The globe w isclosed at its'lower end. The frame carrying plate is also used tosupport the outside casingt which 'forms a cover arranged concentricallyoutside the segmental chimneys with an air chamber or space between.

The upper and the lower sides of casing 'i are preferably bellmouthedvas shown and the lower bell mouthed part is provided with airinlet holes forpermitting air circulation. ln this way air circulatesnot only in the partial annular space between the chimneys and the outercasing but also in the space between the flat sidesof the segmentalchimneys which space communicates with the annular space and containsthe burner tube. .The burner tube is thus arranged in an air circulatingchamber or casing. The upper end nf the chimneys also are provided withlcurved hood portions x by which the gasesV rising within the chimney aredeflected away from the burner tube and the air vinlet m thereto. Thegas nozzle is located `just 'above the delecting plates 1c of thechimneys and consists of a casing' or'nipplea in which there works ahollow pin rprovided with cross ports e and a bridge piece z carrying anozzle z lwhich controls the opening d of the gas nozzle d. The pin 'i'is continually engaging en the under side of the pin hea and thedistance to which the pin 1' is pressed upward is regulated by means of-a pointedV screw s engaging on the u per side' of the nozzle. A furtherscrew s2 1s preferably also provide/d for preventing the pin r frombeing entirely forced out when the adjusting screw s is withdrawn.

The nipple a is provided with an external screw which engages the tube mprovided with the air openings over which there is preferably provided agauze s to prevent the entrancey of dust particleswith the mixing air.The tube m is provided withl a down- -Wardly convergingportion in whichthe internal mixing tube h is supported. Thus the gas and an" enteringthrough the nozzle d and the .air openings in .the tube m respectivelyare intimately mixed in the tube h andpass at considerable velocity downthe burner tube without' coming closely in contact with the wallsoftheburner tube which as described above are cooled externally by theair circulating between -the exterior of thev vchimneys and the casing'i.

vided with shoulders 'g on which the inverted incandescent gas mantle pis supported inV the well known manner.

According to this construction the gas anc pure air entering by thenozzle and -air openings. are thoroughly :mixedywhilel assing downthrough the cooled burner tube and the air for completing the combustionis p'reheated before 1t comes in contact with the mantle yby passing inthe 'direction of tlie arrows y round the outside of the funnel o.,

Further by means of the'hoods qc on the chimneys the burned gases areprevented from 'enteringthe air inlets in the tube m and lastly byproviding the funnel 'v with a practically 'air' tight fitting to theiiange i3 the effective length of the chimney for the combustion gaseslis considerably increased and in consequence, as is Well understood, thedraftis thereby increased and 'the working 'of the lamp renderedl moreeificient.

4Having thus fully described the nature of myinvention, .what I desiretosecure by Letters Patent of the United States is 1. An invertedincandescent lamp having in combination, segmental chimneys, a

burner tube disposed in an air Aspacebetween and supporting saidsegmental chimneys, a burner tip, a mantle supported by said burner tip,a transparent extension common to said se mental chimneys andsurroundingthe mant e,a 4globe closed at its lower end and supported vfrom vsaidsegmental chimneys, an outercasing supported from said chimneys andleaving an air circulation space between itself andthe chimneys.

2. An inverted incandescent gas lamp having in combination,l a lampcasing, a plurality of chimneys of segmental cross section supportingsaid casing with a partially complete annular space between, a burnertubesupporting said chimneys and arranged between but outside the'same,a gas nozzle and air inlet piece arranged above said chimneys andattached to the-burner tube, a burner tip and mantle attached to saidlburner tube,` atrans- Between ported by said se parent extension'common' to said' chimneys and surrounding said mantle.

3. An inverted incandescent gas lamp having in' combinatioma burner tubeexposed to the atmosphere, a burner tipand lmantle for -said tube,segmental 4chimneys supported from said burner tube, a'gas nozzle andair inlet above said segmental chimneys, deflecting hoods onsaidsegmental chimneys for deiilelcting the burned gases .away from said airi et.

4. An incandescent gas -lamp' having in combination, a burner tube, aburner tip and mantle kr said tube, segmental. chimneys .zle and airinlet connected to the upper part of the burner tube and above saidchimneys, deilecting hoods on said chimneys for deiiecting the burnedgases away from said air inlet, a casing lsu ported by said chimneys andsurrounding e same vso as lto form an air circulating space in whichsaid burner'tube is disposed.

5. An inverted incandescent gas lamp havsupported from saidburner tube,a gas nozv ing in combination, a burner tube, a burner'v tip and mantlefor said tube, a plurality of chimneys of segmental cross sectionsupported by said burner tube, a gas nozzle and air inlet piece on theburner tube and arranged above the opening of said chimneys, deflectinghoods on said chimneys opposite said air inlets, a transparent extension'to said chimneys surrounding the mantle; a casing sup- 4 dmentalchimneys and forming an air circulating space in which said burner isplaced.I i

v 6.A An inverted incandescent gas lamp having in combination, a burnertube exposed to the atmosphere, a burner tip and mantle for said tube, aplurality of 'chimneys of segmental cross section supported by saidburner tube, a gas nozzle and air inlet piece on the burner tube'gandarranged above the opening of said-chimneys, said air inletpiece havinga downwardly converging end, a mixing tube with a downwardly convergingmouth piece resting on said air inlet piece and projecting into theburner tube.

" 7. An inverted incandescent gas lamp having in combination, a gasnozzle with a regulating or an, an air inlet piece attached to said nozze and having a downwardly converging end,` a burner-tube fixed to'saiddownwardly convergingend, a mixing piece' with a downwardly convergingmouth piece resting in' said air inlet piece and projectinginto saidburner tube, a .plurality of. segmental chimneyssupported from saidburner tube and providedwith.'deecting hoods'at their u perV ends oposite the air inlet openings, a larger tube fixed to said burner tube,aburner tipcarried by said larger tube, a

lio

mantle supported by said burnertip, a lamp casing surrounding saidchimneys and sup- Qrted by the same so as to form' an ail' circuinWitness whereof have hereunto set my ating easing @mund the chimneys, atranshand in the presence of two Witnesses. parent extenslon on theehlmneys and sur- M Y GRUETZ roundlng the mantle, a globe Wlth a closed5 .bottom surroundin said extension and per- Witnesses: mittng of aircircuation outside .said exten- HENRY HASPER,

si'on to the mantle, substantially as described. W01 DEMAR HAUPT..

